The best way to RESET the BIOS back to the factory defaults if you do not know the Reset jumper or there isn't one is to remove the CMOS/BIOS battery and wait for approx. 20 mins for the charge in the BIOS to discharge.
If you cannot wait that long then short out the battery terminals on the motherboard with a paper clip.
Replace the BIOS battery, go into the BIOS setting and set the date and time etc.
SOURCE: cmos or bios reset for compaq presario C500
To reset the BIOS you will need to remove the main battery & the CMOS battery. To find out how to remove the CMOS battery refer to a service manual if you can find one.
SOURCE: How to reset BIOS password - Toshiba Satellite 1605 CDS
you dont have to take the battery off, just unplug the cmos connector which looks like a stereo wiring harness.
SOURCE: dip switch positions for cmos reset
Hi.
there is no any dip switch for reseting COMS
if u want to reset coms u need to disconnect u r laptop battery & then disconnect coms battery from motherboared witch under keypad .then get press powre button for 30 sec.for discharge static charge of u r motherboard .after that u connect all this to u r laptop u get reseted COMS
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SOURCE: Resetting CMOS due to virus
You will be able to reset the cmos settings if you can enter the cmos setup during startup.
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